Post-mold.



W; R. BURWELL.

POST MOLD. APPLICATION FILED JANI12, 1914.

Patented J an. 26, 1915.

6 Montana 0 THE NORRIS PETERS C0. F'HOTULHHO.. \VASHING roN. n c.

WALTER R. IBUBWELL, OF INAVALE, NEBRASKA.

POST-MOLD.

Specification of Letters Patent.

Patented J an. 26, 1915.

Application filed January 12, 1914. Serial No. 811,678.

To all @071 am it may concern:

Be it known that I, VVAL'rnR R. BURWELL, a citizen of the United States, residing at Inavale, in the county of Webster and State of Nebraska, have invented certain new and useful Improvements in Post-Molds, of which the following is a specification.

This invention relates to molds for making cement or concrete fence posts, and its object is to provide a mold of this kind whereby the posts can be easily, quickly and cheaply made, and with this object in view, the invention consists in a novel com-- bination and arrangement of parts to be hereinafter described and claimed.

In order that the invention may be better understood, reference is had to the accompanying drawing, in which- Figure 1 is a perspective view of the mold; Fig. 2 is a crosssection thereof; Fig. 3 is a side elevation showing the end walls of the mold swung back to facilitate the removal of the mold from the post, and Fig. 4 is a perspective view of a pallet used in connection with the mold.

As shown in the drawing the mold comprises side walls 5 and end walls 6 and 7, respectively. The side walls are stationary, and the end walls are mounted so that they may be swung back in order to effect the ready removal of the mold from the post. The side and end walls are preferably made of thin sheet metal, and the former are reinforced at the top and bottom by longitudinal angle irons or bars 8, which project for some distance beyond the ends of the mold. The end Walls are connected at the top and bottom by parallel pivotlinks 9 to the projecting ends of the angle irons, which permits said walls to be swung back or outward from the ends of the side walls as shown in Fig. 3. When the end walls are swung forward to close up the ends of the mold, they abut against the ends of the side walls, as shown in Fig. 1.

In order to operate the end walls 6 and 7 simultaneously, the following actuating means are provided: On the outside of the walls 5, near the ends thereof, are pivotally mounted, on studs 10 carried by said walls, bell-crank levers 11 and 12 respectively connected by a rod 13 so that they may swing together. One of the arms of the lever 11 is lengthened to form a hand lever 14,-and said hand lever is connected by a link 15 to the end wall 6 intermediate the top and bottom thereof. The hand levers on the respective sides of the mold areconnected by a cross bar 16 which serves as a hand grip. The bell-crank lever 12 is connected by a link 17 to the end wall 7 intermediate the top and bottom thereof. A system of links and levers as herein descrlbed is provided for both sides of the mold, and the arrangement of links and levers is such that when the hand levers are swung up, both end walls swing upward and outward from the ends of the mold simultaneously. Then the hand levers are swung down, the end walls swing downward and forward until they come against the ends of the side walls, and thus close up the ends of the mold. The projecting ends of the angle irons 8 are connected by suitable braces 18, whereby the side walls 5 are held spaced apart. The bottom of the mold is a pallet 19 having transverse corrugations 20 which form cross grooves in one face of the post, which grooves afford means for securing the line wires to the post. The corrugations taper upward to prevent the molded post from sticking or binding, and for the same reason the side walls 5 are made slightly converging toward the top.

Fig. 1 shows the mold ready to receive the concrete or other material out of which the post is to be made. After the mold is filled, the hand levers 1 1 are swung upward to swing the end walls 6 and 7 outward, and when the links 9 come into vertical position, a continued upward pull on the hand levers lifts the mold clear of the post. The pallet 19 rests loosely between the side walls 5, and the post remains on the pallet when the mold is removed as described. Reinforcements can readily be placed in the mold if the post is to have such. As the mold is narrower at the top than at the bottom, very wet concrete may be used without danger of the same bulging when the mold is removed. and the sliding release makes it possible to produce a post having a troweled-finish effect.

In operation, concrete or analogous material is placed in the mold, tamped and two reinforcements are laid on top of the tamped material at equal distances from the sides, and more material is added, tamped, and additional reinforcements placed so as to be at or about the same distance from the back and sides of the posts as the first two reinforcements. added, tamped and struck oil, making a post with a reinforcement in each corner, thus giving the maximum strength.

The mold is very simple in structure and easy to operate, and the posts canbe quickly and cheaply made.

I claim:

1. A mold comprising side walls, top and bottom bars projecting from the ends of said walls, end walls, link connections between the' end walls and the aforesaid projecting bars, levers pivoted to the side walls and connected respectively to the end walls,

; and a connection between the levers.

2. A mold comprising side walls, top and bottom bars projecting from the ends of More material is then said walls, end walls, link connections between the ends walls and the aforesaid projecting bars, a bell-crank lever pivoted to the side wall and having a prolongation forming a hand lever, a connection between said hand lever and one of the end walls, a second bell-crank lever pivoted to the side wall, a connection between the second bellcrank lever and the other end wall, and a connection between the bell-crank levers.

In testimony whereof I afiix my signature in presence of two witnesses.

WALTER R. BURWELL.

Witnesses:

O. G. MATKIN, W. A. CARPENTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

